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1l. Set Special Meeting Date, Pay Com Plan/Comp Worth Study CITY OF ~ . • i CHANHASSEN +�` 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 ' (612) 937-1900 MEMORANDUM ' TO: Don Ashworth, City Manager FROM: Todd Gerhardt, Assistant City Manager t , ' DATE: April 20, 1989 ' SUBJ: Establishing Special Meeting Dates to Review the Position Classification Plan/Meeting with County Assessor ' Staff has not had much success in trying to schedule a special meeting date to review the Position Classification Plan/Comparable Worth Study, and the meeting with the Orlin Schafer, County I Assessor prior to the annual Board of Review meeting on May 16 , 1989 . ' Through a phone survey of Council members, staff is recommending the following two meeting dates be established: 1. May 10 , 7: 00 p.m: Meeting with County Assessor Orlin ' Schafer to discuss upcoming Board of Review. ' 2 . June 5 , 7 : 00 p.m: Position Classification Plan/Comparable Worth Study with Karen Olson from Labor Relations. s 1 i.- CITY 1 .,':=;',-k C ANHAssEN 1 . : . ' 690 COULTER DRIVE •• P.O. BOX 147 •• CHANHASSEN, MINNESOTA 55317 1 �` (612) 937-1900 1 MEMORANDUM ITO: Don Ashworth, City Manager FROM: Todd Gerhardt, Assistant City Manager 01, 1 DATE: April 20, 1989 1 SUBJ: Establishing Special Meeting Dates to Review the Position Classification Plan/Meeting with County Assessor I Staff has not had much success in trying to schedule a special meeting date to review the Position Classification Plan/Comparable Worth Study, and the meeting with the Orlin Schafer, County I Assessor prior to the annual Board of Review meeting on May 16 , 1989 . II Through a phone survey of Council members , staff is recommending the following two meeting dates be established: 1 . May 10 , 7 : 00 p.m: Meeting with County Assessor Orlin I Schafer to discuss upcoming Board of Review. 1 2 . June 5 , 7 : 00 p.m: Position Classification Plan/Comparable Worth Study with Karen Olson from Labor Relations . I 1 1 1 1 II El .. ,,, , 1 I C1YOF . , n L,. _1 r sszx 'I,..„:,. 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 -�, (612) 937-1900 ' March 28, 1989 II Dept. of Natural Resources Attn: Mr. Brian Rongitsch, Supervisor/Ground Water Unit II Division of Waters 500 Lafayette Road St. Paul , MN 55155-4032 I Dear Mr. Rongitsch: Thank you for your prompt response to our request for a speaker I to address our Public Safety Commission. We are most concerned about both short term water conservation ( so that we will have sufficient water supplies for fire fighting, etc. ) and long term II conservation, to ensure continuing water supplies for our citi- zens. I would like to request a speaker from your department for our I next Public Safety Commission meeting, which is scheduled for Thursday, April 13 , 1989, at 7 : 00 p.m. I ,gill request that this portion of the program be first on the agenda and I believe II approximately 30 to 45 minutes would be good, providing some time for questions and answers. be If this is a possibility, I would appreciate your letting us II know. We are very impressed with the response your department has provided us with, particularly from Jay Frischman. Again, thank you for your assistance. I look forward to hearing from II you. Sin e y, I c ., 2-(--) 7"/�` Scott Harr I Assistant Public Safety Director SH:v I cc: Jim Chaffee Wayne Wenzlaff , Public Saf3tv Commission Chairman I II II 1 1 � , M(�f�(STATE OF u v U�J L� O�L=�� MINNE50TA,,+■,, 1990 , DEPARTMENT OF NATURAL RESOURCES DNR INFORMATION 500 LAFAYETTE ROAD • ST. PAUL, MINNESOTA • 55155-40 ' (612)296.6157 March 20, 1989 Mr. Scott Harr City of Chanhassen 690 Colter Drive Chanhassan, MN 55317 Dear Scott: Enclosed are a variety of materials. ' 1) Hydrograph for the City of Chanhassan well . 2) Hydrograph for City offEden Prairie well field. 3) "Ground-Water Resources in Minnesota" - this article is from a Minnesota Geological Survey Publication. This article discusses Minnesota water but also narrows down to the Twin City area (especially the diagrams) . 4) Two DNR publications containing general groundwater information. I pulled the City of Chanhassan file and have found all the city wells are in the Prairie du Chien-Jordan aslui'ers. This is the aquifer most heavily used in the Twin Cities.- ' I hope this information is helpful . ' Sincerely, DIVISION OF WATERS W1.=, ( ' Jay R. Frischman, Hydrologist Ground Water Unit ' JRF:tjb Enclosures AN EOU-\L OPPORTUNITY EMPLOYER ION MN NM MI MN NM MI E I MI all MN NM MN INN NM MI INN - 135-- hi = Hydrograph 2:Carver County Observation Well 10000 hi w T N R23W SECT12 CBD1 City of Chanhassan w o - 140- cr - D r r/\,, _, 0 - z n - 145-__ o w _. m -, or - 150 w 1-- Q o _ - 155- I- a. - o -160 1 1 1 11 111 1 i I i 1 i T i I T TTTT I i f i l IT1l I I I I I I IT1 I I I I 11T7 T fT 1 I T I T T T Tj T T TT 1 1 I I I I 74 76 78 80 82 84 86 88 YEAR I♦ NM MN OM NM MN MI IIIIIII NM = IIIM M MN M I♦ MI N HYDROGRAPH 3:EDEN PRAIRIE DEPTH TO WATER MEASUREMENTS _ WELLS 1 - 10 FOR FALL 1987—FALL 1988 _ C _ i it t,. t/i 1. ---t t r IC t`E ►Y/ �l 4 �D - t� 4 •t :, tnt t Jr 1i t rt ► , �►'►` ►( tt1 Q - t ► r . r l ' r.. 1 eV 1\ •• - •-, i'l i ‘ '. 17; • 'i I r-Th-t-^ il . . /. I . , ' ft o - 150— �! �' Ji; . EP1 1 1 r I __ o — EP 2 , I ' 1 EP3 t I LA r M — t t ' , , r _ EP5 ,i1 : QLLI •- EP6 ; - EF 7 / t r r ° —250— EP8 — t.'E ' ' t r _ t_ t t EP10 1 a. - r r r W 1 r O - r t t r r r - r r r _ err 1 —350— rrriirrrrirtttrti—r-FTrIrrrrtiIItrrrririiIttrrtttrt t ► 87.8 88.0 88.2 88.4 88.6 I t t r ► r DECIMAL DATE IN 1987 OR 1988 88.8 899 .0 1 I GROUND-WATER RESOURCES IN MINNESOTA I Rudolph K. Hogberg Except for local areas in the northeast and west. \lin- example. studies of the stirticial deposits indicate that the nesota has adequate resources ot good quality _round water size. shape. and sequence of the glacial deposits depended ' \lost rural areas and town obtain their water supplies from upon the environment that existed during the time the ice wells. \linneapolis and 5t Paul use large ,plumes of ground lobes occupied the region In this area. the moraines are stater for air conditioning. Howes er. the Twin ( 'ties metro- composed mostly of till and Form sheet-like deposits. each politan area and mans other large communities in the state Leer or which consists of a heterogeneous mixture ot par- obtain nearly all their water supplies from streams and tides ranging in size trom silt to boulders. \Ian of the till lakes. deposits are composed dominantly of sands that are in a In the state, reliable data on the position, structural con- matrix of silt- and clay-size particles. Outwash plains- the figuration. and areal extent of the bedrock aqutters gen- composite aprons of several alluvial tans that were deposi- eralty are available only for the major urban centers. How- ted bs meltwater streams, tend to consist of several out- ever. even in the urban areas specific information on the wash deposits. each of which is lens-shaped in section. tan- physical and chemical ensironments of the geologic units shaped in plan. and composed of stratified sands. Ice-con- generally is poorly known. tact deposits—kames. eskers and ice crevasse tillings—are limited to small parts of the area and are transitional in STRATIGRAPHIC AND STRUCTURAL lithotogt between till and outwash deposits. The primary CONTROLS glacial deposits commonly were reworked bs waters that formed small glacial lakes and by late- and postglacial In Minnesota. ground water occurs in both the uncon- solidated rocks. mainly glacial drift, and the bedrock, and [reams The resulting tabular bodies of stratified sand is available locally from one to several aqutters depending commonly contain silty sand lasers. In some parts of Min- upon particular hydrodynamic and geologic conditions. nesota. large glacial lakes such as \g*asstz. Attktn. Duluth. \email'. and Upham frig. I\-l) provided basins for the Glacial Drift accumulation of silty and clayey sediments trom 5 to 80 As discussed presiousit (\\right. this volume) tour ice feet thick These extinct glacial lake basins as well as most lobes flowed across the land surtace ot Minnesota during smaller basins in northss estern. north-central. and east- the latest. or ■■isconsin. glaciation Each lobe included central Minnesota now base a surtace cover of peat. Thin from one to lour pnases or advance and recession t\\right and Rube, 1965) The composite ertect ot the Pleistocene glaciation is the sexual types of constructional features that now Form Minnesota varied landscape. only the extreme northeastern part or the state has landtorms resulting from I glacial erosion thg I\-I) Approximately 60 percent of the �'T. states surface. other than lakes. is immediately underlain --_ — —�•by morainal deposits. about 25 percent by lacustrine de- _ - ^�^ posits. and the remainder by Outwash deposits. Postglacial : - ��— -- : ' _ erosion. during the past approximately 10 000 sears, has I _ �i i somewhat modified the surface glacial features. -- ? The glacial deposits are composed of rock materials that I ` ""` ! 'EXPLANATION were available to the ice lobes at the land surface. Materials ti—r� ' I - __ '"; c-1=.;-f_-_r--- -.e 2,•,.s.rs carried from a north and northeastern provenance (fig. I\_ ', _- ! �.if%' :f:tlsf. I, I) are generally red and sandy and are composed predomi- , i r, ,5, , .e—,-.:e eo os nantls of sand-size particles, the pebble-size traction con- "i , sists mostly of crystalline rocks. In contrast. the materials — that were carried from i northwestern provenance are s el- s-', �yis_, J low or gray and calcareous. they are mostly composed of S I sand-size particles but have considerable quantities of silt- —x —1 and clas-size particles. in some areas a considerable part of —. (r c aria _ear cal �"' '- the sand- and pebble-size traction is shale. —`-- t' : ~` Inasmuch as the glacial deposits are heterogeneous. a knowledge of their stratigraphic relationships is needed to Ills —_ {" , determine the environments most suitable for the occur- rence of ground water In the \linneapolis quadrangle. for I igure I\-I tiurticial (glacial) geologic map of \linnesota. ( H I\ /GEOUO(;l OF \l l\\,ESOT-\ 595 1 lasers of loess. ,omposed mostly of 'i!t-si;e paroles, cover the overlunn I'alcozorL succession r \ustin. 1969i The the bedrock and glacial Jntt in Iparts ,,t southeastern \Inv- I"win ( icy basin, the only formally named basin in the state. Little or no detinihve quantitative rntormauun is asail- is about 2.000 square miles in area and contains ii maxi- able in the :ru on either recharge of surrace eaten to the im)or shout I Ito) test of Paleozoic and 200 test of (_p- ' _round-eater •v stem or addition or ground waters to the per I of the Precambrian rocks that comprise the ski Paleozoic e i unlace skater , 'rem Jude strata ut the basin \ maximum of I 500 rest of ed from the data, it seems norm confining hcus. lake deposits form rocks (Austin. I 970b) occur within the southern part ot probable that t,,,-. the Hollandale embayment In the northwestern corner or impermeable to semipermeable barriers to water flow, and the state, as much as 450 feet of Ordovician rocks are ove - ' :cc-contact deposits provide env ironments similar to out- over wash and till deposits, \lost of the data now available con_ margin about 40 feet of Jurassic 'red beds" at the eastern ern the state's shallow-drat aquifers from which most of margin ot the Williston basin Upper Cretaceous sandstones and shales. which ranee the ground water is pumped. I from 50 to 400 feet in thickness, uncontormably overlie the Bedrock older bedrock in western Minnesota (Austin, this volume). Rocks ranging in age trom Earl Precambrian to Late Cretaceous comprise the bedrock of Minnesota (pl. 1). The GROUND-WATER PROVINCES Ibedrock surface commonly is buried beneath approximately To describe the ground-water resources of Minnesota.100 to 200 feet of glacial drift, and locally more, and it is it is convenient to divide the state into four provinces— exposed in parts of northeastern and southeastern Miring—southeastern. east-central, northeastern, and western (fig. sofa. Altitudes on the bedrock surface range from a low of IX-3) The boundaries of each province are drawn as close- ' about 500 feet above sea level beneath the Red River \al- ly as possible to the limits of the controlling geologic ley, in the northwest, to 2,301 tees at Ear \ features. which generally are various stratigraphic units Cook County, in the northeast(fig, gle fountain in within the glacial drift The southeastern province is char- Cook ) acterized by near-surface glacial deposits, mainly of north- ' The Precambrian rocks are dominantly impervious ig- neous and metamorphic rocks: Lpper Precambrian arkosic western provenance, which overlie Paleozoic bedrock with_ sandstones and shales occur beneath Paleozoic rocks in in the Hollandale embayment. Lhe east-central province is east-central Minnesota. Paleozoic rocks crop out in south- underlain by drift of northwestern provenance which aver- ' eastern \linnesota and occur beneath Mesozoic and C eno- surticibal depositsCtand th c ensiveralreas oprout aoh ands zoic strata in extreme northwestern Minnesota. In the occur in the western part of this province. The principal southeastern part, the Paleozoic rocks comprise the Hol- bedrock ,tyuirer, the Hinckley Sandstone, underlies the landale embavment (see Austin. this volume) )mall basins drirt in the eastern part. [he northeastern province has a -.O., I and faults within the Precambrian rocks pros ided minor to ot[ ot northeastern and north- ern controls on deposition and the present structure or thin discontinuous cover ot d ern provenances. [he western province has the most varied ----� (,� .._Th — Di t 1 I � f /, I . o rId\ �o c F-- � aasr? ren?rah Western --. •; ( 7 .-7•Y ' 7� `' iuulnebstern •icon ', � Figure IX-2 Topographic map of bedrock surface. Figure I.\-3. Ground-water provinces of Minnesota. I596 GROLND-\\ -\TER GEOLOGY I cuiu_i, ens iron ment of the tour ground-ss ater prosince,. Twin Cities \letropolitan Area , In most of this area. niper\ions Lr\,talline rocks of Pre- Ground ssater is stored within the cambrian ace sire directls oserlain hs 5( Brock. Twaril dries _ ) to -l(R) feet ot and post glacial alluvium (table I\-I t in the Twin C (ties ( retaceous shales and sandstones. In the northwestern metropolitan area corner or the pros Mee. as much as 500 feet or Ordosician and Jurassic rocks oserlie the basement rock surface. Gla- ('(runt! Orrlr ,tint -Writ nmr f,;;r, •r, \ ,cqucnce of vial Lake \,assiz, which corers most of the northwestern glacial deposits From 50 to st)t) reef thick oscrimes the eroded part. contains �la\ev lake plain sediments and small local f Paleozoic bedrock surface :n Inc area. shallow—less than sand bodies. Drift. dominantl\ of northwestern prosenance, l f�Ct d"p nd some of the ssatha roe most polluted ay domestic s\elh. and some of the\sell, hase been polluted by .md associated surtace and buried outs\ash deposits. user- the effluents from soil absorption ss sterns. Numerous lenses lies the bedrock in the southern part of the pros ince. ot cras ells sand are known to occur in the drat at medium Southeastern Province depths. but information on their water quality and \fields water are from the is poorls known Probably the burliest s telding drift aqui- The state s largest yields or ground 'cis are bodies ot ,and that are confined within the network southeastern pros ince. The combined \It. Simon-Hinckles and the combined Prairie du Chien-Jordan are the most ot buried bedrock sallcv,. fhe Salley, that have been de- and aquifers. Glacial drift aquifers yield low (5-100 litigated feet Payne, extend are 0'S to 1.25 miles wide. 50 gpm) to moderate (100-695 gpm) amounts of ground water. to 450 feet deep, and extend fur tens of miles. The ground-water supplies in the southeastern province Riser terraces containing abundant deposits of sand are adequate for parallel the Mississippi. Minnesota. and St. Croix Rivers and q present and foreseeable needs. In unl\ a their maior tributaries. These deposits are as much as 200 tew areas are sufficient quantities of ground water of acceptable quality absent In much of the prosince, sand tees ribose the river lenses. are as much as 150 feet thick, and gruel aquiters (rig IX-41 are capable of yielding. much and hale sields ot as much as 500 gpm The water table more water than is current!\ withdrawn. some of them surfaces ,lope, however toward the river channels, and base potential \fields ot more than 500 gpm to wells less accordingly the saturated thicknesses attain oils a few tens than 300 feet deep The bedrock aquifers are among the of feet Some of the sands of the terrace deposits and of highest yielding aquifers in the United States. Yields from the flood plains contain silty materials whose yields ap- the Prairie du C hien-Jordan and the \It. Simon-Hinckley proximate 40 gpm , aywters range tram 500 to 3 000 gpm to wells 400 to I 500 Bedrock Aquifers The sedimentar\ rocks within the feet deep The ground water from the southeastern pros ince Csstn C its basin are a maximum or about 1.300 feet thick. and contain six aquifers (table IX-I and fig. IX-5). Two is suitable for most uses V.ith moderate treatment. Gwier mafor and tour minor aquifers \icld water to wells. The all}, the hardness and high iron content need to he cor- mator aquifers are the \It Simon-Hinckley and Prairie du rested Other chemical characteristics such as sulfate. ( hien-Jordan. the minor ones include the Ironton-Gales- chloride. nitrate, and dnsolscu solids meet drinking water rifle, the Reno Member of the Franconia Formation, the irrigation and mans industrial standards. I st Peter and the Platter ille-Decorah aquifers. The Platte%ille-Decorah• the shallowest or the Twin c its ayuirers. \ields low quantities of water from fractures. fhe underlying St Peter Sandstone. which is approximately _ ._^ 140 feet thick, is capable of yielding moderate quantities of moderately hard (61-120 ppm) water. but the quality of the ■kater is questionable in heasils urbanized areas. Beneath _ — the St Peter a the combined Prairie du Chien-Jordan I "�! aquifer Of the two units. the Jordan sandstone has the ' '` EXPLANATION greater porosits but the Prairie du Chien Group provides 1 •e∎cs - we'5 the highest yields. The 5-toot-thick. s cry silts dolomite b . ,:: beds I r' S"c a c ;"" ot the St Lawrence Formation separate the Jordan Forma- 1 ..1: ; �S). rx ; - �7 nun from the 130-foot-thick Reno Member ot the Fran �.;' ^^ ) More �_.. " .. , i coma Formation Small quantities of moderate's hard water 4C .. - .: are available from the Reno Below the Reno, separated by !•1, � ` a •'ice 1 y 1 silty to dolomitic sandstone beds ot the Franconia contin- I �,�::':''•;-:4 yam V - ess ;?V �� '�_' „r�s : 1 �i trig bed. is the approximately 65-foot-thick Ironton-Gales- ,...-.2.: :-_^� — ~ { secm:K sille aquifer Intakes for wells in the Ironton-Galesville . ::: ` aquifer range in depth from 500 to 1.200 feet. Because of• • ' I ;-• the higher yields from aquifers above and below, few wells I w ., -. �_ are completed in the Reno and the Ironton-Galesville, and 's_ M—�' ' -'� accordingly only sparse data are available on their yields. —�_ I However, water levels are lower than in the Jordan Sand- ' stone, showing that recharge is receised from above. The Figure I\-4 Ni ields to wells in sand and gravel deposits, \It. Simon-Hinckley aquifer. the deepest and second most upper Mississippi River watershed important aquifer of the Twin City basin. yields moderate I ( H I\ I GEOLOGY OF MINNESOTA 597 I I . _ .. Fable 1\-1 \Vater-heanng characteristics k.)1 geologic units. Twin ( it\ basin I , Siezerai 2-?scr::::::: I : ...: 1 ........ . .r:R:- :::-.: , - I :-...r_. .:..-..--_:•,:-":.:: i !— 4 I , I .7.= I -=: i . i I,di:I.,,nt,aied q.;:acial derosit i I _ . •I I 1 i I De:0Ni,Shjie I ‘41) I i is.,,d,,:eni,n.cray.nsmie to Hock, ,, I :,,,oterous arm:tont:inJi a.re,a,tn anund.en,an.ara ! , •a. - I i 1 P!attolile Formation 1 Co ti ; nolosinne.ocni•gr.o.to hurl ilun•t.,0..d,,,,:.1,1....... . I s....----. I i: . . 7.: 1 I,!en,00ki ormation ; ■0 • 1 -. , I shale.greernol-ara..1,•oe•,nds 7 ..3, s t.peer s.,,,,,,,,„., 1,0 ,Samt,..,n,e;Znrie0r.a: asel..sona,•‘1,1:1,,,,,k ,,d ,,..,,,,r ,,,,r,.1. ! —...—'..- -1 r........ ... t_ lnnr,”rtI I . P". I _ i Shakopee Formation .... i 50 Dolosione.bolt.thtn-CO thtdk.dVddetL•111•and•and-neh nwd-a tnIn \ •andslont tetla near haw 1 I I ..fl 1..... %V., ,en,.eld,Ir,,rn,,,,,,,C,—a.•,,,,,,and Iron, 1 llooci,,ne.tutf.!hill.In th,c1.•Ovdded.,t,ep.'Tied•qr tilt•alh: 1 . Oneoca C1/44011111C 100 1 11;! . slo■onnte rnatrtx iandqone:tent-gras lia.st•em neaded.nivd.10.oarw.er ....11,oted t I . -1 I',on Co.na,n I Jordan Sandstone 90 Coo,.coodnted adarlto,e o I I Sc.Las F srence o I rmation 1 I 50 P . . ' ---4 Dolo.tonc.era,lo Ian.silly or aand,.11.01.11,0.•diamond.tn ur,er 1 : 1 , 7,1 • • . Franconia Formation 155 I Sandoone ereentql-era,Inonovdded!me to..oars,•er .11,10 1.11•■■,...,i• ..•mnion.at-IL...nom.an anper-NU.,i Rol,r.-1 one•er,orhp.t.,, i E --1---- 7-_-• ".-.,- I .... c_. c: ? i Ironton Sandstone I 30 San.lone.Iteht-gra,Nor!,to..cli..orn..d.rna,•er ,”I•rmn....all...,: , , ■,,-, -„ • 0 1 x3 I I Galesville Sandstone ! 15 --.... ( Fad Claire 1,,rmation ro I;II I ' I I i \1 t Simon,Sandsione I Int) ....:- i ' Hinckley Sandstone 75 Sandoone.tan 111.1 10..0.0,,,f .1,0., f _-_.__________• 0 • - - — — 0 a -aa a i 3 Fond du L.:Ft,I'MatIOn (0 4.000 landoond Jr,I satitone Inc-er -.set!o.n4ntLd arko,• pn:trrea 0 and older sedimentary rocks red to ereen rincaecou,Olate I 0 cu 0., i L-7—._.-,___k____-----.....-- ■ Metamorphic to 20.0IN) ■tosti■mane.Loa dd...on min Interrlo,■,cdanent. L NI . - and Igneous Rocks to high qt.larlIIIICS or relatively soft (<60 ppm) water. It is (Corona-It liter .+Iippile% \t most places in the Fw in (-its I underlain ne by the sandsto and shales of the Fond du Lac Formation Although le permeable than the Prairie du basin tug I\-.51. the water is under artesian rressure Pumping of large \olumes ot ground water trom weds with- Chien-Jordan aquifer, the Nit. Simon-Hinckley aquifer is in the metropolitan area has Lhanged the direction and rate I thicker—about '35 feet—and Yields about as much water of normal ground-water Circulation Water le\els in the to wells Howe‘er, the long-term yields probabk will he hedroLk and glacial aquifers have declined appreciark since less because of its slower rate of recharge, the first records in 1885 l'iezontetric surtace mans show 1 598 GROUND-WATER GEOLOGY I ML _ I ,--f-••■••"----.,_ 'tr...:-)\--y-D.-C---‘-r-L t C Clouds > >., __, ._. ,..,Ls::_...._.„ _ , ..._°_ I :: I \ a \` I c CL N :• \ < Surface Runoff and Storage ) evaporation and transpiration !!! evaporation and transpiration .tea°oatrp*a • �•, I ♦• q ��li���Runorr Q ��:. �n I ao�o. r ~ Laks YRunef tr.��.fat• ..-. ..a.—M- t;�:. .. �I LoR1( 1 ,alt yw (LORI TT1._- r velar -,:o _ 01' _:1. > �,.. y'.. -. - sprin r i;u T ■ - "- - a -. —. r�a�..' 1 +. y -• Womb. P • P is ttanlla ?...: r' ••-_ - 6t - '� Jr trot Form etiM F� �� Jordan ° Sandstone .. -- o 3 \,l' -_ ..St, lay rant• Fer n�atien- • �_� Franconia Formation "' --- _ I CD . Mt. Simon Sands tone• _ ` --� - -H incalay a sanaon. . .. ___ = _- -. _ -- _ Fond du Lac Formation and older sedimentary roans — -- E NPL ANATI ON AQUIFERS CONFINING BEDS - • -'• , , ,. - - ■____■ I Glacial drift Limestone Sandstone Direction Sandy shale Shale of water movement I(vertical onaaperatian about 50 a) Figure IX-5 Diagrammatic section through Twin City basin showing probable direction of water movement. that as a result of heavy pumping, water is now flowing levels within the \It. Simon-Hinckley aquifer for the same toward the pumping centers instead of toward streams .ind eriod have been lowered as much as ,_ I P 0 feet in downtown lakes as it did previously However, natural hydraulic Minneapolis and as much as 170 feet in downtown St. gradients have been reversed in only a small part of the Paul The greatest declines, in general, coincide with the metropolitan area. areas of greatest pumpage. Outward from the well concen- Bedrock wells in downtown Minneapolis and St. Paul trations, the water-level declines have been less. Water I are closely spaced and interfere with one another. especial- levels ui the Mt Simon-Hinckle■ aquifer generally fluctu- Iv during the heavy pumping required for air conditioning. ate from less than a toot to about 10 feet during the day Piezometric maps drawn on the Prairie du (hien-Jordan Water levels in the Prairie du C hien-Jordan aquifer. how- aquiter indicate that the water levels declined about 70 feet ever. fluctuate as much as 5 to 10 feet in a day in winter in downtown Minneapolis and as much as 90 teet in down- and as much as 5 to .11) feet a day in summer The water town St. Paul between 1885 and 1965 (fig. 1\-6). Water levels generally do not return, in the off-season, to the I ( H 1\ 1 CiF.OLOGI OF \1INNESOT \ 599 I . _. I :{FLA, ,.. • a i1<,/roc•k 1qutferr fhe bedrock of the Hollandale em- ,1 ha�nent comprises I mprises a large southward-plunging syncline. the - = 1,•2,3f, e. -7,-- axis axis at which extends from the Nu) ( 'ties to Alpert Lea 4:1°NN°' and Austin. With one exception the Dcsonian ( edar �al- I l I N�,•, i Lev Formation water is obtained from the same sandstone / / `° formations as in the Twin ( its basin In the Austin area. ,� ground water is obtained from the ( edar \,alley aquifer ' '."//,-// �_ Yields from this aquifer are low to moderate and are en- i �` eralls from small channelways along rock fractures. The ..•! N•nn�iCnrC ar �. underis the Galena. Decorah. and Platteville formations �* ��. /�/J' 4UL•h "='1 yield small quantities of ground water from fractures and•I IS1iNN�AP _•- _JJ ji� I I — ! vugs. Except for a silty- or shah-sandstone confining bed ':':a� I `� that is 20 to 35 feet above its base, the St. Peter Sandstone / \��� �� generally has a high porosity The aquifer is a dependable source of small to moderate quantities of water for house- ' hold and farm use and for a few small municipal and in- ayy� ;;,,c dustrial supplies. The Prairie du Chien-Jordan aquifer sup- plies high yields of moderately hard water. The `It. Simon- s."or�fpa,cora Hincklev aquifer supplies moderate to high yields of rela- Figure IX-6. Decline of the piezometric surface of alt, tively sort water, but the Mt. Simon is absent at the northern limits of the southeastern province, and the Hincklev Sand- Simon-Hincklev aquifer from 1885 to 1965, stone is missing in all but the northern prong. Scattered. I in a part of the Twin Cities metropolitan thin patches of Upper Cretaceous clay, shale, and impure area. sandstone overlie the Paleozoic surface in about 20 percent of the Hollandale embayment. Yields from these are mostly low-10 to 50 gpm. Ilevel of the previous year. thus resulting in a general down- East-Central Province ward trend in water levels. This lowering has caused local Ground-water resources ot the east-central province oc- problems such as increased pumping costs and pump setting cur mostly within outwash sand deposits mat were lett by I charges. It should be pointed out that the problems asso- the glaciers that moved user the area from the northeast. elated with water-lesef declines are mostly economic in \laderate to high Melds are available from the Upper Pre- nature. Another problem is that most ot the possible annual Cambrian Hincklev Sandstone, and sery low Melds of water recharge to the bedrock aquifers is being discharged to at sortable quality are available tram the fractured crystal- I streams and lakes and evaporated to the atmosphere from line rocks at Earls \I fiddle. and Late Precamnrian age, land and water surfaces and transpired from plants. Thus. In this region. the glacial drift ranges in thickness from the theoretical yield of the Twin Cities area tar exceeds 50 to 300 feet but generally is less than 100 feet thick. It I present withdrawals. The Hollandale Embayment (southern part) consists mostly of till that was deposited as moraines of low to moderate relief and as till plains I\\right and Watts, Paleozoic bedrock aquifers provide abundant ground- the mora morainal ridges. e.xten side outwash deposits occur in the I water supplies within parts of the Hollandale embayment. western part tit the province trig Important shallow aquifers include sand bodies within the silts sans that wee deposited in C lac old ake c�inado glacial drift and alluvial deposits within the deeply eroded Hie. I\-I) cover much of the northeastern part ot (ariton river valleys. C ounty. I here sediments have low I Glacial Drift and Alluvium Aquifers. The bedrock in ground-water yields. the Hollandale embayment is covered by 50 to 200 feet of -\ttkiaranediments occur in the areas oc.upied by lakes glacial drift, in the same way as in the Twin City basin. An Wells tapping the outwash deposits yield as much as 500 exception is the so-called "driftless area" in the extreme gpm Large supplies of ground water are as,iilable from out- I southeastern part of the state, which contains scattered drift wash deposits within the st C rota River watershed, in the but is mostly covered by a thin layer of loess. The drift con- tains irregularly spaced sand and gravel aquifers of different areas east and south of Hincklev, and tram the outwash y deposits and the river terraces that parallel the %I ississippi sizes (fig. IX--4), the most important ot which are confined River from Little Falls downstream to \Itnneapolis f'roh- within buried bedrock valleys. ably, recharge of surface waters into these aquifers is rapid The valley tit the Mississippi River is filled with as The sandy sediments could provide high-solume. sustained much as 200 feet of alluvium, which are flood plain de- v gilds of ground water for various uses in industrial plants I posits as much as 10 miles wide. Wells within the alluvium and in agricultural irrigation yields greater than 1.000 gpm, thus providing ad e- Moderate to high quantities or water are obtained from quate water supplies for most industrial and municipal users thick sand lenses in the glacial drift in the Mesabi district Iwithin the area of the Mississippi River flood plain. I-he direct-shipping Iron ore bodies in the district also v ield I600 GROUND-\\.ATER GEOLOGY tt<. 1 • medium to high quantities of ground slater I he water tram much smaller :irea than the moraine, i he outwash and both tilt iron ore bodies and the ,ands draft s similar in ,,riles train deposit,are a\ much a, __ ;c et thick I quiltss it IN low in dl ,oh■d solids. moderate's siliceous. \\[thin the wet oraine. which cst-r.,, :ram the eastern hard to \ers hard, ,Ind high in in and manganese. border of the province to the I ,-s., .^d 5nuth Dakota Moderate to high s ields of ground water are ohtainetf boundaries I - - , unJane, ,Intl include, the hi_hl,:.,: r,'_c :gown ,I, the from the high's fractured ro,.k, 01 the i rommald I orma- ( oteau des Prairies, ground moraine 'r sill deposit, having tion and associated -\ntniikian 1\fiddle Precambria ) rock, low relict torm most 01 the surface ,:epositn. In the same 01 the t ilk una district 1 he Hnckles auutler in Pine C oun- was as the central uplands. the wet Prairie has surtace is and ,idtoining parts or hanahec. 'sand. and Sherburne deposits of northwestern-prosenan..c :^atenals that range I ( aunties \field, moderate-200 gpm to 1(h) gpm—amounts in thickness tron) 11)0 to 5(1(1 tees Outss: „b planss comprise of hard i I_1-1�0 ppm) water has mg a high content of iron a small part of the near-surtace glacial deposit,. \ortheastern Province Bedrock I Ground-water supplies tor needs greater than domestic [he bedrock consists mostls o, Lower Precambrian uses arc difficult to Ind in mans ot the northeastern ,nei„es, schsts. granitic rock, ntciasolcante rocks. and pros ince because ot a generally thin drift cos er he Du- metasedimentars rocks I pl Ir tiious Quartzite overlies luth- upenor metropolitan area obtains most 01 its water these rocks in many areas on the southwest side of the \iin- from Lake superior NA titer supplies for agriculture. mining. nesota Riser In the northwestern part ot the state. Ordo- toursm, and lumbering are mostls ssrthdrawvn from streams stcian and Jurassic sandstone. shale. and carbonate rocks and lakes. The glacial Britt and the postglacial allus ism and cis erlie the basement rocks. L pper t -etaceous kaolinitic beach deposits in the pros ince are potential sources 01 mod- residuum os erls in<_ shale and. locus\ carbonate rocks crate amounts of water Loss \field—I to 20 gpm—slater oscrhe the basement rocks in much or me region supplies can be obtained trom fracture zones in the bed- rock The tracture zones are ditticult to locate. and the Northern .-\quiters water tound in them ranges widcl\ in uualits Ground water can he obtained tram mans sandy glacial drat aquirers in the northern part of the western province. Western Province [he ■ields to wells in the till and the rake plain sediments The potential tor hiding adequate ground-water sup- are generails low, and the water is nigh in iron and very plies within the western pros ince sartes widels depending hard In parts 01 the Glacial Like -\_assiz region. where upon the local geology In the northern part ground slater the ground wirer circulates througn toe \lesozoic and%or is asaitable from sand bodies in the Jritt. and in the south- Paleozoic rock, and glacial shut the water supplies are un- ern part it occurs Poth in 'and bodies within the Britt and suitable for human consumption because or the high chlor- in poorly cemented C ietaceous sandstones. iue content l oval c\cessne .li rho,r assail in the Farco- \Iooncc,rJ area ha\, resulted In decline in artesian pressure Glacial Drat within the glacial aquitcn. For convenience. the glacial deposits within the west- Fhe shallowest and most Jepenuanie aquirers are the ern province. ssnich „111ge in ul ckness trom 50 to 500 teet. gra\elis sands 01 the abandoned beacn Pars and the riser can be described ssith espect to three major landscape channel altos nun Ground-water \melds from these deposits regions. III the Glacial Lake Agassiz plain, in the north- general's are low to 11)1) gpm I-he water is sery hard I western and northern parts. i_) the central uplands, and i?) i--> 18 ppm) and high in dissols ed solids. surtace and the wet prairie in the southern part. The Glacial Lake buried outwash deposits s field moderate amounts or ground .Agassiz plain. which was rormed b\ Glacial Lake Agassiz water-100 to 200 gpm The water is noderatels hard. has —which inundated parts of northwestern Minnesota and high Juolsed solids, moderate to high iron. low manga- I s parts ot the Canadian pros rotes ot Manitoba. 5askatche- nese and varies in chloride content from i 0 to 200 ppm wan, and Ontario in late-glacial time—is underlain m:unls Ground-water yields from the bedrock in the northern by clayey to silty sands as much as 150 feet thick Grasell■ part ot the western prosmec are loss in both quantity and sandbars were formed at the sites 01 former beaches. Ihese quality Fhe L pper ( retaceous residuum and sandstone I are discontinuous and are linear in shape hase loss s fields-5 to 50 gpm--are rcratnels hard, high in The central uplands is an area of medium to high relict iron and saline The basement rocks are not suitable that is underlain general's bs 200 to 30(1 feet of glacial drift sources of water so tar as known I An easterly-trending ridge called the Itasca moraine ex- tends trom the Lake Agassiz basin through parts of Becker Southern Aquilers and Hubbard ( aunties to Leech Lake, to the north. low In the southern part of the western pros ince the pnn- reliet moraines and till plains border the eastward extension cipal bedrock aquiter, .ire the 1 pper t retaccous residuum I ot Lake Aeassir -\ fishhook-shaped ridge. 25 to -10 mules and poorls cemented sin dstones 1-he o:cement rocks are wide. trends southeasterls from the eastern end of the Itasca unimportant sources of water Important glacial ,aquifers moraine to the point where it crosses the \Iississippi Riser include the buried outw,sh and the ailusium ot the surface alley hetween I lk Riser and ( learwater and then trends and buried stream channel, I northeastward to Grantsburg. \\',consul Fhs ridge is Because ot its large content of salads. the wader trom called the -\Iesandna moraine Outwash plain, occupy a the Lpper ( retaceous sandstones is ot poor quality but 1 ( H I\ /GFOIOM OF \ll\\ESOFA 601 _ice 1 supplies of better water are not readils asailable. Intakes 400 tent deep \Ilu\turn within most of the major tribu- 1 for wells tapping the Cretaceous aquifers are 150 to 300 fates to the \linnesora Riser including the ( htppew:t. the feet deep. }jell, trequentls exceed I�0 zpm. although some Pomme de herre. and the I ac qui Parte rivers. \fields meth- well: sick] orals »U gpm. An alternate source at water in urn amounts or water Locally. alluvial deposits exceed 100 parts of the areas underlain ht ( retaceous aquiters Is sand teet in thickness and \icld up to 1 000 gpm In the upper ' t'outes within the glacial drat: these hase low transmtssi. htlaies as ut the \Itnnesota Riser \alley the flood-plain alluvial s well as a high content of solids. deposits are relatisels thin and the basement rock surface is at or near the land surface. In the lower reaches of the ' The glacial drat and allusium within the \Itnnesota riser. however the glacial and ostg , Riser watershed are mator sources of around water Conn_ postglacial deposits may he mayor sources of ground water To date. the s tells from murals water is obtained tram depths of about 100 feet, but the outssash and alluvial aqutters of the \linnesota River luealls Prom depths of less than 20 feet. Buried outwash watershed hase been adequate for municipal and industrial deposits s ield as much as 1.000 gpm to wells as much as needs. I602 GROUND-WATER I) \ TER GEOLOGY ma -, P. y■� _, T, f _ ,�1 \ \ I �_ 1 i I I 1 ,----------‘, ne----.. ..„.----....„ ,.....,/,....-1 1_, '; i i 1---),-/ i(---\ -\ ' •■••7 Illv••■•1 I C.:: : i ) i "r■ i Ij ; i \\\_, �� ', > \ , i j 1 1 -, I 1 ; ; Imo. 1 i water fills all available open spaces material with lower permeability. I %,..-,g,ifound'C ( and yields water to wells or springs, it Water entering these aquifers may is called an aquifer.The surface of this travel great distances to points of I j c�-�. .�7 zone is called the water table. withdrawal The water in a confined Ic or Two characteristics make a aquifer is under pressure greater than geologic formation an aquifer:the atmospheric.When a well is drilled Little is known about ground ability to contain and transmit water. into it,water rises to an elevation I water. More valuable than oil or Porosity is the total volume of open above the top of the aquifer.This level diamonds, it lies beneath the space in a formation available to is called the potentiometric level. earth's surface. Exploring the accept water;permeability is the Figure 1 illustrates the difference hidden and uncharted regions degree of interconnection between between a confined and unconfined these open spaces which enables a aquifer. of this natural resource today, formation to transmit water. The could mean providing water greater the porosity and permeability Ground Water Resources of I supplies in the future. of a geologic formation,the more Minnesota water it can yield. Ground water in Minnesota occurs round water is one of our most I In general,aquifers can be in unconsolidated deposits(sand and valuable resources,an classified as unconfined (water table) gravel of glacial origin),and in enormous,underground circulatory or confined (artesian). consolidated deposits.The supply system as large as all Minnesota. In an unconfined aquifer,the water potential of aquifers in these two I Surface water is the first stage in below the water table is under broad categories varies. .what hydrologists call the hydrologic atmospheric pressures and Bedrock aquifers can be divided cycle.Water evaporates from rivers, replenishes mostly by local vertical into crystalline rocks which form the lakes, and oceans, rises into the percolation. The water level in a well bedrock in most of the state,and into atmosphere,and forms clouds. From drilled into an unconfined aquifer stratified sedimentary sandstone and I the clouds,the water returns to earth represents the water table. limestone underlying the in the form of dew, rain, sleet, hail, A confined aquifer is one that is southeastern corner of Minnesota. I and snow. sandwiched between layers of Sandstone and limestone formations Once it reaches the earth,this precipitation takes several paths. It can evaporate,flow into surface I water,transpire through plants,or Recharge percolate into the ground. 1 Area Water Table 7 Potentiometric Surface Well Ground water underlies the earth's 9,� l Water Artesian Well surface almost everywhere. It is often y Table Ground Plowing I difficult to locate, measure, or Surface i well vt.describe;in some places it is ,� _y�*c �- inaccessible.It can occur close to the / I surface,in wetland areas for example. \ 4j Water Table But in arid regions, it can be many hundreds of feet below the surface. ��j� Unconfined - I Most ground water is potable, but not 'I/G� Aquifer I J Confining all ground water is fresh enough for ���/ y/ t„,---'' Stratum use without treatment. Impermeable i �yy///��j � Strata r- P'7.....,"": I Ground water occurs in pores, Confined Aquifer cracks,and fractures in hard rock such as limestone,sandstone, or - • granite. It also occupies open spaces I in sand and gravel deposits.Where FIGURE 1. Unconfined and Confined Aquifers. i mil Iare the onmary water source for the water level measurements trom a management strategy for southeastern section including the observation wells in aquifers around aquifer-wide allocation of water I Twin Cities. The crystalline rocks the state By comparing changes in Surface geophysical methods, generally underlying the remainder of water levels with precipitation data,it namely electrical resistivity and the state provide water only locally is possible to determine when an seismic reflection and refraction, will I I where they are fractured. aquifer is being stressed. be tried out in different geologic Consequently, these bedrock aquifers • Hydraulic Characteristics of settings to see if they can assist in have limited capabilities to be a major Aquifers The primary technique used selecting drill sites to get maximum water source. to determine the supply potential of a information for the least cost.The I Much of the state is covered by water-bearing body is an aquifer test — so named because the aquifer, not cost of drilling has been a major unconsolidated glacial deposits stumbling block.These aquifers must (collectively called"drift")more than the well,is being tested.The test be investigated,however,because 100 feet thick.Glacial drift up to 600 consists of pumping from a they are the sole source of water for Ifeet thick has been found in the completed well for a predetermined communities,agri-businesses,and western part of Minnesota.Large time and at a predetermined rate. irrigation development in the western quantities of water are available from Measurements of water levels are third of the state. I sand and gravel deposits occurring compared with those of several The surficial and buried drift within the glacial drift,particularly in nearby non-pumping observation aquifers in Swift County will be the the central part of the state.In the wells.The hydraulic properties of the focus for the development of a I Red River Valley, fine-grained clayey aquifer are calculated based upon the management strategy.The first step drift marks the location of Glacial Lake observed declines in water level with will be to estimate the maximum Agassiz.Its low permeability reduces time,the distance of the observation long-term ground water supply. its ability to serve as a water supply wells from the pumping well, and the Subsequent analysis of several l source. It is often necessary to pumping rate. regulatory methods will be discussed develop water supplies from the sand with local water users before and gravel deposits which are buried Managing the Ground Water appropriate alternatives are selected I there at greater depths in the drift. Resource:Regional Studies for implementation.The maintenance • Increasing Use of Ground Water of a long-term ground water supply is Managing the Ground Water from Drift Aquifers, Increasing ground very important to the future economic IAResource: Data Gathering water use from drift aquifers about well-being of this area as the value of ground water investigation which little is known is challenging irrigation to farm receipts has been involves the collection and computer decision-makers.By 1980, a 20 year estimated at$4.1 million annually. On analysis of data. Interpretation of the study to evaluate the water supply in the average,an irrigated acre in Swift I data tells if an aquifer is capable of the major surficial sand plain aquifers County has been estimated to provide serving as a water-supply source. statewide was completed. Today, $309 in farm output compared to Determining the potential c4 a water water supply development of deeper $115 for dryland farming. (1978 data I source includes: water-bearing bodies called buried from the University of Minnesota.) • Well Logs.Licensed water-well drift aquifers continues. The buried contractors are required by law to drift aquifers supply substantial It is hoped that these new approaches I prepare a list of materials penetrated amounts of water and occur in to studying and managing our ground while drilling a water well. By complex hydrogeologic settings. The water supplies will be effective,and comparing the available well logs in a study of these aquifers is complex that this pilot project will be the given region,the depth,thickness, and costly, but this must be done for beginning of a long-term strategy for I and extent of aquifers can be development to occur. investigating and allocating the determined. • Accelerated Ground Water ground water resource. •Water Level Measurements. For Management Program The I many years the State cooperated with Department of Natural Resources the United States Geological Survey receives support from the Legislative This pamphlet was coauthored by Patricia Bloomgren and Brian Rongitsch, (USGS)and local units of government Commission on Minnesota Resources hydrologists with the Water Use to develop new tools to investigate Management Section.DNR Division of to systematically gather and analyze Iground water A pilot project is testing Waters. I . I DNR Reports is a series of free publications on Minnesota's natural resources published and distributed by the Minnesota Department of Natural Hesources,Bureau of Information and Education.350 Centennial Office Building,St.Paul.MN 55155.Please write for a list 205 of titles available in this series.This is title number: 2 84 CITYOF . , ,.. ,_ . ..L,„, , .u 690 COULTER DRIVE •• P.O. BOX 147 •• CHANHASSEN, MINNESOTA 55317 1 ' (612) 937-1900 II MEMORANDUM I TO: Jim Chaffee, Public Safety Director FROM: Gary Warren, Director of Public Works/City Engineer II DATE: April 10 , 1989 SUBJ: Water Conservation II File No. PW203 II Attached is an excerpt from the Ap ril 8, 1989 Star Tribune con- cerning the growing trend to require homes to utilize the "water-saving" toilet in new and replacement construction. As II noted, the water-saving version uses 1 . 6 gallons per flush versus the 3 . 5 to 7 gallons per flush that comes with the older toilets. In my opinion, adoption of this conservation measure could II greatly benefit the City in the long run as water becomes increasingly in short supply and the expense of obtaining it and treating it increases . II I welcome your and the building department ' s thoughts on this measure since it would be enforced via the building permit/ inspection process . If this appears reasonable to you it might , be appropriate to have one of the inspectors make some contacts with manufacturers and users of these new facilities to identify any problems which may present themselves with this type of uti- II lity. On the surface it looks very attractive and I would like to see that we pursue it at this time. cc: Don Ashworth, City Manager II Jerry Boucher, Utility Superintendent I II II II II iiii SR bYa'iiiii;nt:!_iaryriiiiiilyby_ iiii OM _ 3R .1111 MI Nil ihstwater s orta P�/ s t .7,„e . . : x a on toilet i s x . ta. , : ' Vi:: r S ( Come Vi3it N. "Spring Prey Warm,traditional architecturally d'k - distinguished young professionals, ac SINGLE LEVEL PLANS,2 STORY" PLANS,$130's to.190's New York Times Standards Institute have only managing director."We're usin g •: represents about 15 percent of the recently been completed. half the water we were before." 1.4 billion gallons used a day now. Located in Eden Prairie 494 to Hwy 62 exit.: Ever so slowly,but too late to help fight the current drought,a solution Thus,the toilets are unavailable to He said each room's toilet is Proponents elsewhere say the 1.6- 1 0 Cry 4,rig on 62nd . a .+v. west on 62,then left c Is coming to one of the nation's help save New York City from flushed an average of eight times a 1/4 mile to model N biggest water gobblers,the toilet. repeating its severe water shortages daily.The change has cut water use gallon nd dramatic impact on immediate rte 5 'v_ 937-5245 of 1964-65, 1980-81 and 1985,or to. — 937-5245 per toilet from 56 gallons to about household's water consumption. 6 water-saving model that uses 1.6 help other regions avoid such a 13 a day. gallons per flush is now creeping , crisis. — —� � onto the market to replace older Water officials estimate ,�,______l . ontott,the market uteo.replace l ce 7 gallons But,water-supply officials sa Glendale,Ariz.,a Phoenix suburb conservatively that a family of four, ( r pply say, people,began requiring with each member flushing a 5- �� y= �r = and have always concerned water- conservation-minded lawmakers the water-saving models in all new gallon toilet four times a day,could .eonservation officials,especially are starting to demand the toilet, homes and bathrooms in January save about 55 gallons a day by during the current drought and that is forcing manufacturers to 1988,at a time when few were on , converting to the new models. ;emergency. produce the new models more the market,according to David quickly. Schultz,Glendale's water Most of the new toilets available Mone fOi Environmental authorities estimate conservation coordinator.Several now cost between$100 and$200, Y That toilets account for 30 to 40 On March 3,Massachusetts became thousand have been installed,and plus installation costs,officials said. percent of a household's daily water the first state in the country to Glendale's water use You Want consumption. rewrite its plumbing code to require grew only 2 the 1.6-gallon models in all new percent percent increase in 1987,he aid• noticeably dife different from the older t In New York City,toilets in homes, buildings and remodeled office buildings,apartment houses, bathrooms.Los Angeles will follow In Princeton,N.J.,a nonprofit ones.gravity Most work ip on e.But the Home Eel -poSpitals and hotels use 350 million this summer. housing p gravity flow principle.But the sides gallons a day,or about 25 percent 8 nrouH Princeton of the tee bowl have steeper angles and Up to 100% of of the 1.4 billion gallons used in the On March 7,a bill was introduced replace all the 5-gallon toiletsin a more eft ent.Thesehchan ere y •city daily,officials say.Hence the in Congress requiring the toilets in 238-unit townhouse complex its empty the bowl faster,thus saving ' •Home Imps vemen Consolidation • growing sense of urgency for all new construction and operates.The change is expected to water.Some models also contain conservation in the bathroom. renovations after Jan. 1, 1992.The cut a$90,000 annual water and compressed air devices that create a ]n]ream Vacation New York City Council recently sewer bill to$60,000,officials said. • vacuum and powerful sucking Ca" 831-6 "It really constitutes the last fixture received a similar proposal,but frontier for water savings,"said with a start-up date of Jan. 1, 1991. Because the existing or pending action when flushed. Steven Ostrega,director of New A similar regulation is now before legislation does nomanda mandate , Of the major toilet manufacturers I In Roches( York City's Bureau of Water the Delaware River Basin replacing working toilets, •Tax-Advantaged r. pp ov i •• t( Register. Commission,which regulates water appreciable in the country, on of said. it •24-Hr.Approvals•xt g ppreciable water savings for an , ; started production of the 1.6-gallon use for 7 million people in western entire supply system will take years, model last fall and American �,,� ate His boss agreed:"It's the best and southern New Jersey,eastern officials say. Standard said it plans to do so by �— ii77�" hardware solution to get people to Pennsylvania,four counties in New late spring.Eljer declined to ll/j2l�e�!/!?Qii?l'lll'�f save"rather than urging them not York's western Catskills,and in If the bill now before the City comment. to flush,said Jeff Sommer,first northern Delaware. Council is approved,New York's 4' deputy commissioner of the city's million toilets would be replaced at• New York City ofcials said they Department of Environmental In widely scattered places,the'-; ' ,' a rate of 5 percent,or 200,000 a chose 1991 to implement the new Conservation. toilets are already in use.In Boston, i year. d wholesalers in order to give Sptcious 1- the 6 Hotel Lenox tore nut the 25- •, • ,, wholesalers time to sell existing • year-old 7-gallon toilets in its 220 ' OStrega;of the bureau of water ff stockpiles and give manufacturers ' The 1.6-gallon toilet has been . widely used in Europe for years, guest rooms late last year and ' register,calculates that installation ;; time to increase output. But only a few thousand are in s installed the 1.6-gallon models to of 200,000 1.6-gallon toilets would place now in American homes and ; cut its water and sewer bills. cut New York's water use by 20 "We're giving them notice that this - A buildings,partly because gf g �s _ �i,; million gallons a day in the first 0. is the way to go,"Ostrega said. �'�� � engineering and performance tests 4, "It works,it really,works,"said year and by 200 million gallons a i, for the American National i; G Saunders,the Note' ` Gary hotel's day in the 10th year.That '' -, r 1_,,a._40,. 1 , ..D_CITY OF i ALI C ; t ANHASSEN 1 . , �,� K,. 4 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN,-MINNESOTA,55317 I cr (612) 937-1900 i MEMORANDUM I TO: Don Ashworth, City Manager , ,. FROM: Jim Chaffee, Public Safety Director . ... - 1 DATE: July 20, 1988 "� s' g� -- SUBJ: Public Hearing to Amend City Code Section II y o 19-28 , Sprinkling Restricted 1 On June 13 , 1988, the City Council approved first reading to amend the City Code regarding sprinkling restrictions, Section 19-28 . II On June 27 , 1988, the final reading to the ordinance amendment was presented to City Council. At that time, the Council decided to hold a public hearing regarding the ordinance amendment. The r public hearing was therefore set for July 25 , 1988 regarding the II following ordinance amendment: Section 19-28. Water Use Restricted. 1 Whenever the City Council (by resolution) or on a temporary emergency basis , the City Manager and the Fire Chief shall II determine that a shortage of water supply threatens the City, they may limit the use, times , and hours during which water may be used from the City water supply system. Any water customer who shall cause or permit water to be used in viola- II tion of the provisions of the resolution shall be in viola- tion of this code. It is staff' s recommendation that the ordinance amendment be 1 adopted as presented. 1 cc: Scott Harr, Assistant Public Safety Director II I 1 1 ash 1 1 if) . ______-_. C I T Y 0 F II . ..- _. } `�.. : �.�� 690 • COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 !_, (612) 937-1900 IIMEMORANDUM -- — - - 1 TO: Don Ashworth, City Manager i.-A: . - ... FROM: Jim Chaffee, Public Safety Director .t':r:= �:.: .. ' 4-i7-1st . . 1 DATE June 16 , 1988 I SUBJ: Final Approval on Second Reading of the Ordinance Amendment to City Code Section 19-28 Sprinkling Restricted 1 On June 13 , 1988 , the City Council had the first reading to amend the City Ordinance regarding sprinkling restrictions , Section 19-28 . The final reading to the ordinance amendment should read: 1 Section 19-28 . Water Use Restricted. Whenever the City Council or on a temporary emergency basis , the II City Manager and the Fire Chief, shall determine that a shortage of water supply threatens the City, they may, by resolution, limit the use, times and hours during which water may be used 1 from the City water supply system. With the amendment to the ordinance, as indicated, the City of ' Chanhassen' s Public Safety Department will be able to take imme- diate enforcement action. In addition, City Staff may institute graduated water use restrictions as may be dictated by the cir- cumstances . The following graduated step system for sprinkling/ Iwater usage restrictions will be established by policy directive: 1 . Odd/even watering restrictions; I 2 . Odd/even watering restrictions with defined times; 3 . Total ban with a permit system. 1 1 t I 1 MI rCity Council Meeting - July 25, 1988 ''' II 2. Additional landscaping be provided along the southwest side of the proposed I docking and parking area. The additional landscaping shall include evergreens for year round screening. 3. The applicant shall obtain and comply with all conditions of the Watershed 1 District permit. 4. A standard concrete cross gutter shall be installed at the intersection of 1 Quattro Drive and the proposed 24 foot driveway. This cross gutter shall be installed as per the detail enclosed with this report (refer to Attachment #2) . 1 .5. The applicant and contracter shall ensure the City that the newly constructed Quattro Drive shall remain intact throughout the construction II process. 6. The storm sewer plan shall be revised to show the connection to the existing storm sewer stub along the westerly right-of-way boundary for Quattro Drive. II 7. An erosion control plan shall be submitted to the City Engineer for approval prior to final site plan review. I 8. Meet the requirements of the Public Safety Director. 9. Remove all dead or diseased trees from the property. I All voted in favor and the motion carried. II VISITORS PRESENTATION: There were no Visitors Presentations. II PUBLIC HEARING: ORDINANCE REGARDING SPRINKLING RESTRICTIONS. IMayor Hamilton called the public hearing to order. Councilman Gevi.ng moved, Councilman Johnson seconded to close the public II hearing. All voted in favor and the motion carried. The public hearing was - closed. Councilman Johnson moved, Mayor Hamilton seconded to approve amendment to II Section 19-28, Water Use Restricted as presented by staff. All voted in favor and the motion carried. II Councilman Horn: Can you give us a brief update of where we are? 1 t Mayor Hamilton: Yes, Gary can you tell us how the water situation is holding up? r, 1 II _ Gary Warren: With the current sprinkling ban that we have in place, even and odd from 5:00 in the morning to 11:00 basically, our pumps are able to regain II 13 II City Council Meeting - July 25, 1988 c's 1 1 whatever was loss we see a significant dracdown on our new reservoir. basically late afternoon, typically in the week, we are almost to a filly condition and the pumps are able to rest and relax over the evening hours until 1 we get the morning rush so I'd say right now we're where we want to be as far as the pumps are getting time to rest. The reservoir is able to handle the demand when we do all the sprinkling and everybody seems to be cooperating very well with the sprinkling. 1 Councilman Geeing: Any intent of what we're established? removing the ban? Any possibility of relaxing IIGary Warren: I would say only if, we're still running 13 inches of percipt this year and if we can get MotheraNatureitoo knock about out2some 1 of that deficit, I think that's what we need to see first. ACCEPT SUPPLEMENTAL REPORT NO. 1 FOR WEST 78TH STREET FEASIBILITY STUDY AND SET 1 DATE FOR PUBLIC HEARING. Mayor Hamilton: I guess the date for the Public Hearing is August 22nd, a 1 regularly scheduled Council meeting. CounciLmembers need any additional information on this item? Councilman Geving: Are all the assessment information made available? Has that I information been made available to the developers in terms of the financing packages that you're proposing here? 1 Gary Warren: The methodology was consistent with the original feasibility as far as the assessment roll itself. Councilman Geving: The reason I ask that question, 1 from the developer when this comes up and we do prceedowithwthisany surprises Gary Warren: We do not have the preliminary roll revised as a part of this 1 report but we will have it in time for the public hearing so that information will be distributed prior to that date. II Councilman Geving: I'll move to approve this item and call for public hearing for August 22nd. Mayor Hamilton: Second. 1 us Councilman Johnson: I ' roll y J t realized when you said there wasn't a preliminary page 10 it says revised preliminary assessment roll has been completed and I is included in the appendix for reference. here since it's not included and not contained wnld the iap to strike that out of ppendix. II Councilman Geving: You're right, this should be amended. It does include it in this particular feasibility study. Gary Warren: It will be inserted with the proper corrections will be inserted 1 as a part of the public hearing copies. 1 14 mw - - )' ity Council Meeting - June 27, 1988 1 CONSENT AGENDA: (N) CITY CODE AMENDMENT, SPRINKLING RESTRICTIONS, FINAL READING. Councilman Horn: I was curious, we did hold a public hearing on this? It seems ' to me that something like this we should have a public hearing on whether it's required or not. Acting Mayor Geving: Would this be normal Barbara? Councilman Horn: No, I don't think so. I Acting Mayor Geving: This would not be a normal operation? Barbara Dacy: No, the public hearing isn't required because it's not an amendment to the zoning ordinance. However, it's up to the Council. Councilman Horn: I think any ordinance change that affects how people live ' should have a public hearing. One of the complaints that we've gotten is that this thing was totally mismanaged in terms of informing the public and I totally agree with that. I think one of the ways we as a body counteract that is by having public hearings when we have an ordinance change. I'd like to suggest that we do that. Acting Mayor Geving: Any comments? Bill, do you agree with that? Councilman Boyt: Can't argue against a public hearing. Councilman Johnson: I don't have a problem with a public hearing. I do have was going to pull this one also. The wording ' I L City Council or on a temporary ng in here, it says whenever the porary emergency basis, the City Manager or Fire Chief shall determine that a shortage of water supply threatens the City, they may, by resolution. Now, how is the Fire Chief and City Manager, by resolution, going to call for a sprinkling ban? I think we have to reword this to where we have that the City Manager and Fire Chief do have the temporary emergency basis to do this. They can do it on a temporary emergency without having a resolution and then it shall be followed up within some set time frame to have a resolution. Acting Mayor Geving: I would agree that those two words, by resolution, are meaningless in this context. Councilman Johnson: With the City Council side of it it's okay but it probably needs to be broken into two pieces. Acting Mayor Geving: Is that all you had there? I Councilman Johnson: Yes and I agree with the public hearing. The other thing I was going to talk about was the lack of good communication on this one. guilty of poor communications with the citizens quite often. It's not that are tough, I believe you can get a postcard type thing to go through Xerox machines. We could publish and print overnight cards to go to every citizen in the City if we would stock the stuff. The concept is there. We didn't really communicate this well enough. On Monday after the emergency call, we should have had a mailing go out and when we switched back last Thursday, we should have had another mailing go out. A lot of people don't know what's going on. Not 14 , ma City Council Meeting - June 27, 1988 59 +' everybody reads the newspaper paper so we can't depend upon only the newspapers. �', Especially something as important as this, as our only communications. I think � this also points to the need for a public information officer for the City as a II 1 part time duty for somebody that is the focal point for desiminating this kind of information. The other thing was, we had mass confusion up front. Something needed to be typed up and handed to the receptionist just from hour to hour on ' that Monday and Tuesday. It seemed that everything was changing and that actually was what was happening is that the emergency was maturing. We were getting a better understanding of it. By later in the week the ground rules were well enough known but I had a friend who for several weeks carried buckets 1 of water to her garden just after she had her gall bladder surgery. She was told she couldn't get a permit just because she has stitches in her side but she can carry her buckets. She didn't actually tell anybody she had stitches in her side. She's just that kind of person. I think there's a lot of mice in the world that don't create waves and when they don't get clear instructions, they don't know exactly what's happening, they don't protest and they go carry their water buckets out there to water their gardens with buckets but that's all I've got to say on that. Acting Mayor Geving: I think we all learned a great deal from this emergency ' and it wasn't really an emergency. I think that the Fire Chief and City Manager acted in good faith to take care of a situation that I believe at the point we probably should have had a City Council meeting. There should have been some better semination of clearcut information as to what was really happening. Possibly even hand carried flyers from door to door. I think we finally caught up by using the television and of course we had very good coverage from the local papers so we've learned a lot from this effort and hopefully the crisis is I 1:"— somewhat past. Not to say it isn't going to happen again in a different way with a different means but I do think we do have an area now. We have an ordinance amendment where we can handle this. The Fire Chief, City Manager is ' involved. Certainly the Public Safety is involved. One of the things that I wanted to include in this ordinance amendment was a means by which the public safety department would be totally responsible for getting out to the media what these levels of water useage restrictions would be in this particular case. So we have to place the responsibility someplace and I believe that that's where it should be. That it should be with the public safety department in getting the media attention and information. As far as Clark's recommendation in terms of a ' public hearing, I can see nothing wrong with that. I think it's a good idea. If we get the information out first and then can have a public hearing. This is important. It's one of the more important things that we've talked about in the ' last couple of weeks. I think we've got it solved here or at least got a handle on it. No further questions or comments. We're going to direct staff to add whatever comments that were made tonight to this. My specific comment was that I would like to see the public safety department be totally responsible for the media attention and dissemination of information and Clark Horn's suggestion here that this be placed in terms of the public hearing. ' Councilman Horn moved, Councilman Johnson seconded to approve the table the final reading of the City Code Amendment, Sprinkling Restrictions until a public hearing can be held on the matter and to include having the Public Safety Department responsible for informing the public. All voted in favor and the motion carried. 15